Identify in which period and place you find the digit 5.5,782,431
A. Period: ones, Place: millions
B. Period: ones, Place: ones
C. Period: millions, Place: tens
D. Period: millions, Place: ones
Answer: D
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Solve the problem.If f(x, y) = (2000ey)/(1 + 
/2) represents the population density of a planar region on Earth, where x and y are measured in miles, find the number of people within the rectangle -6 ? x ? 6 and -3 ? y ? 0.
A. 8000(1 - e-3) ln 4 ? 10,538
B. 4000(1 - e-3) ln 
? 7904
C. 4000(1 - e-3) ln 4 ? 5269
D. 2000(1 - e-3) ln 4 ? 2635
Establish the identity.(cos ? + sin ?)2 + (cos ? - sin ?)2 = 2(cos2? + sin2?)
What will be an ideal response?
Perform the indicated operation.
A. 
B. 
C. 
D. - 
Estimate the sum or difference by rounding each number to the nearest thousand.91,359
A. 69,000 B. 69,800 C. 70,000 D. 69,700